summaryrefslogtreecommitdiff
path: root/utils/storeinfo.c
blob: 0bfc1b1fc9e630d7c5cdfa4fee5de6a6ff8e3780 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
/* Show where a file exists

   Copyright (C) 1995, 1996 Free Software Foundation, Inc.

   Written by Miles Bader <miles@gnu.ai.mit.edu>

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

#include <hurd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <argp.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <version.h>

#include <error.h>

#include <hurd/fs.h>
#include <hurd/store.h>

char *argp_program_version = STANDARD_HURD_VERSION (storeinfo);

static struct argp_option options[] =
{
  {"kind",        'k', 0, 0, "Print the type of store behind FILE"},
  {"name",        'n', 0, 0, "Print the name of the store behind FILE"},
  {"blocks",      'b', 0, 0, "Print the number of blocks in FILE"},
  {"block-size",  'B', 0, 0, "Print the block size of FILE's store"},
  {"size",        's', 0, 0, "Print the size, in bytes, of FILE"},
  {"runs",        'r', 0, 0, "Print the runs of blocks in FILE"},
  {"children",	  'c', 0, 0, "If the store has children, show them too"},
  {"dereference", 'L', 0, 0, "If FILE is a symbolic link, follow it"},
  {"prefix",      'p', 0, 0, "Always print `FILE: ' before info"},
  {"no-prefix",   'P', 0, 0, "Never print `FILE: ' before info"},
  {0, 0}
};
static char *args_doc = "FILE...";
static char *doc = "Show information about storage used by FILE..."
"\vWith no FILE arguments, the file attached to standard \
input is used.  The fields to be printed are separated by colons, in this \
order: PREFIX: KIND: NAME: BLOCK-SIZE: BLOCKS: SIZE: RUNS.  If the store is a \
composite one and --children is specified, children are printed on lines \
following the main store, indented accordingly.  By default, all \
fields, and children, are printed.";

/* ---------------------------------------------------------------- */

/* Things we can print about a file's storage.  */
#define W_SOURCE	0x01
#define W_KIND		0x02
#define W_NAME		0x04
#define W_BLOCKS	0x08
#define W_BLOCK_SIZE	0x10
#define W_SIZE		0x20
#define W_RUNS		0x40
#define W_CHILDREN	0x80

#define W_ALL		0xFF

/* Print a line of information (exactly what is determinted by WHAT)
   about store to stdout.  LEVEL is the desired indentation level.  */
static void
print_store (struct store *store, int level, unsigned what)
{
  int i;
  int first = 1;

  void psep ()
    {
      if (first)
	first = 0;
      else
	{
	  putchar (':');
	  putchar (' ');
	}
    }
  void pstr (char *str, unsigned mask)
    {
      if ((what & mask) == mask)
	{
	  psep ();
	  fputs (str ?: "-", stdout);
	}
    }
  void pint (off_t val, unsigned mask)
    {
      if ((what & mask) == mask)
	{
	  psep ();
	  printf ("%ld", val);
	}
    }

  /* Indent */
  for (i = 0; i < level; i++)
    {
      putchar (' ');
      putchar (' ');
    }

  pstr (store->class->name,W_KIND);

  if (store->flags && (what & W_KIND))
    {
      int t = 0;		/* flags tested */
      int f = 1;
      void pf (int mask, char *name)
	{
	  if (store->flags & mask)
	    {
	      if (f)
		f = 0;
	      else
		putchar (',');
	      fputs (name, stdout);
	    }
	  t |= mask;
	}

      if (! first)
	putchar (' ');
      first = 0;
      putchar ('(');

      pf (STORE_READONLY, "ro");
      pf (STORE_HARD_READONLY, "h_ro");
      pf (STORE_ENFORCED, "enf");
      pf (STORAGE_MUTATED, "mut");

      if (store->flags & ~t)
	/* Leftover flags. */
	{
	  if (! f)
	    putchar (';');
	  printf ("0x%x", store->flags);
	}
      putchar ('(');
    }

  pstr (store->name,       W_NAME);
  pint (store->block_size, W_BLOCK_SIZE);
  pint (store->blocks,     W_BLOCKS);
  pint (store->size,       W_SIZE);

  if (what & W_RUNS)
    {
      psep ();
      for (i = 0; i < store->num_runs; i++)
	{
	  if (i > 0)
	    putchar (',');
	  if (store->runs[i].start < 0)
	    printf ("[%ld]", store->runs[i].length);
	  else
	    printf ("%ld[%ld]", store->runs[i].start, store->runs[i].length);
	}
    }

  putchar ('\n');

  if (what & W_CHILDREN)
    /* Show info about stores that make up this one.  */
    for (i = 0; i < store->num_children; i++)
      print_store (store->children[i], level + 1, what);
}

void 
main(int argc, char *argv[])
{
  int deref = 0, print_prefix = -1;
  unsigned what = 0;

  /* Parse our options...  */
  error_t parse_opt (int key, char *arg, struct argp_state *state)
    {
      void info (mach_port_t file, char *source, error_t err)
	{
	  struct store *store;

	  if (file == MACH_PORT_NULL)
	    error (3, err, source);

	  if (print_prefix < 0)
	    /* By default, only print filename prefixes for multiple files. */
	    print_prefix = state->next < state->argc;

	  if (what == 0)
	    what = W_ALL;

	  err = store_create (file, 0, 0, &store);
	  if (err)
	    error (4, err, source);

	  print_store (store, 0, what);
	  store_free (store);
	}

      switch (key)
	{
	case 'L': deref = 1; break;
	case 'p': print_prefix = 1; break;
	case 'P': print_prefix = 0; break;

	case 'k': what |= W_KIND; break;
	case 'n': what |= W_NAME; break;
	case 'b': what |= W_BLOCKS; break;
	case 'B': what |= W_BLOCK_SIZE; break;
	case 's': what |= W_SIZE; break;
	case 'r': what |= W_RUNS; break;
	case 'c': what |= W_CHILDREN; break;

	case ARGP_KEY_NO_ARGS:
	  argp_usage (state);

	case ARGP_KEY_ARG:
	  if (strcmp (arg, "-") == 0)
	    info (getdport (0), "-", 0);
	  else
	    {
	      file_t file = file_name_lookup (arg, deref ? 0 : O_NOLINK, 0);
	      info (file, arg, errno);
	      mach_port_deallocate (mach_task_self (), file);
	    }
	  break;

	default:
	  return ARGP_ERR_UNKNOWN;
	}
      return 0;
    }
  struct argp argp = {options, parse_opt, args_doc, doc};

  argp_parse (&argp, argc, argv, 0, 0, 0);

  exit(0);
}